Bug summary

The "over value" and the "under value" of colormap are not correctly shown when using ax.invert_yaxis (invert_xaxis if the colorbar is horizontal) function.

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt
im=plt.imshow(np.arange(10000).reshape(100,100),vmax=9000,vmin=1000)
cb=plt.colorbar(im,extend='both')
cb.ax.invert_yaxis()

Actual outcome

Expected outcome

The "over value" and the "under value" could be shown in the right location by the way. The "under value" is expected to be at the top, if the y axis is reverted.

If this is not a bug, would it be a feature?

Additional information

No response

Operating system

CentOs

Matplotlib Version

3.5.0

Matplotlib Backend

No response

Python version

3.9.7

Jupyter version

No response

Installation

No response